wastedlocker | 887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d

Analysis

max time kernel
20s
max time network
124s
platform
windows10_x64
resource
win10v20210410
submitted
26/07/2021, 12:42

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General

Target

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe
Size

1.1MB
MD5

6b20ef8fb494cc6e455220356de298d0
SHA1

763d356d30e81d1cd15f6bc6a31f96181edb0b8f
SHA256

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d
SHA512

ef53b73a911a608439bf929fa66a66fbf015ed274735b91c1d3b08128b14d6514d5514157e541441b9de0827d068c8f514cfd24a3a52fecb2d09764c4fb3311a

Score

10^/10

wastedlocker cryptone discovery exploit packer ransomware

Malware Config

Signatures

WastedLocker
Ransomware family seen in the wild since May 2020.
ransomware wastedlocker

CryptOne packer 4 IoCs

Detects CryptOne packer defined in NCC blogpost.

cryptone packer

resource	yara_rule
behavioral2/files/0x000200000001ab59-117.dat	cryptone
behavioral2/files/0x000200000001ab59-118.dat	cryptone
behavioral2/files/0x00030000000152fa-123.dat	cryptone
behavioral2/files/0x00030000000152fa-125.dat	cryptone

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Executes dropped EXE 2 IoCs

pid	Process
2696	Diag:bin
2076	Diag.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
2408	takeown.exe
3936	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2408	takeown.exe
3936	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Diag.exe	Diag:bin
File opened for modification	C:\Windows\SysWOW64\Diag.exe	attrib.exe

Interacts with shadow copies 2 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
3932	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Diag:bin	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3604	vssvc.exe
Token: SeRestorePrivilege	3604	vssvc.exe
Token: SeAuditPrivilege	3604	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 512 wrote to memory of 2696	512	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	76
PID 512 wrote to memory of 2696	512	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	76
PID 512 wrote to memory of 2696	512	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	76
PID 2696 wrote to memory of 3932	2696	Diag:bin	77
PID 2696 wrote to memory of 3932	2696	Diag:bin	77
PID 2696 wrote to memory of 2408	2696	Diag:bin	81
PID 2696 wrote to memory of 2408	2696	Diag:bin	81
PID 2696 wrote to memory of 2408	2696	Diag:bin	81
PID 2696 wrote to memory of 3936	2696	Diag:bin	83
PID 2696 wrote to memory of 3936	2696	Diag:bin	83
PID 2696 wrote to memory of 3936	2696	Diag:bin	83
PID 2076 wrote to memory of 3296	2076	Diag.exe	89
PID 2076 wrote to memory of 3296	2076	Diag.exe	89
PID 2076 wrote to memory of 3296	2076	Diag.exe	89
PID 3296 wrote to memory of 3504	3296	cmd.exe	91
PID 3296 wrote to memory of 3504	3296	cmd.exe	91
PID 3296 wrote to memory of 3504	3296	cmd.exe	91
PID 2696 wrote to memory of 3836	2696	Diag:bin	92
PID 2696 wrote to memory of 3836	2696	Diag:bin	92
PID 2696 wrote to memory of 3836	2696	Diag:bin	92
PID 512 wrote to memory of 2408	512	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	93
PID 512 wrote to memory of 2408	512	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	93
PID 512 wrote to memory of 2408	512	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	93
PID 3836 wrote to memory of 2128	3836	cmd.exe	96
PID 3836 wrote to memory of 2128	3836	cmd.exe	96
PID 3836 wrote to memory of 2128	3836	cmd.exe	96
PID 2408 wrote to memory of 1932	2408	cmd.exe	97
PID 2408 wrote to memory of 1932	2408	cmd.exe	97
PID 2408 wrote to memory of 1932	2408	cmd.exe	97
PID 3296 wrote to memory of 2396	3296	cmd.exe	99
PID 3296 wrote to memory of 2396	3296	cmd.exe	99
PID 3296 wrote to memory of 2396	3296	cmd.exe	99
PID 3836 wrote to memory of 2712	3836	cmd.exe	100
PID 3836 wrote to memory of 2712	3836	cmd.exe	100
PID 3836 wrote to memory of 2712	3836	cmd.exe	100
PID 2408 wrote to memory of 188	2408	cmd.exe	101
PID 2408 wrote to memory of 188	2408	cmd.exe	101
PID 2408 wrote to memory of 188	2408	cmd.exe	101

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
2396	attrib.exe
2712	attrib.exe
188	attrib.exe

C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe
"C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:512
- C:\Users\Admin\AppData\Roaming\Diag:bin
  C:\Users\Admin\AppData\Roaming\Diag:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2696
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:3932
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Diag.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:2408
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Diag.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:3936
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Diag" & del "C:\Users\Admin\AppData\Roaming\Diag"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3836
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:2128
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Diag"
      4⤵
      Views/modifies file attributes
      PID:2712
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe" & del "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2408
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1932
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe"
    3⤵
    - Views/modifies file attributes
    PID:188

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3604

C:\Windows\SysWOW64\Diag.exe
C:\Windows\SysWOW64\Diag.exe -s
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Diag.exe" & del "C:\Windows\SysWOW64\Diag.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3296
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:3504
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Diag.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:2396

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

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Downloads

memory/512-115-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/512-114-0x0000000000580000-0x000000000062E000-memory.dmp

Filesize
696KB

Download
memory/2076-126-0x0000000000DB0000-0x0000000000DC0000-memory.dmp

Filesize
64KB

Download
memory/2076-127-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2696-120-0x0000000000520000-0x000000000066A000-memory.dmp

Filesize
1.3MB

Download
memory/2696-121-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads